Strainer



Dec. 9, 1941.Y

STRAINER Filed July 3, 1940, 2 Sheets-Sheet 1 M. H. SMITH i 2,265,550

INVENTOR MYRON H. SMITH OQMM' ATTORNEYS Dec. 9, 1941. r M. H. SMITH 2,265,550

y l vSTRAINER Filed July 5, 1940 2 Sheets-Sheet 2 INVENTOR MYRON H. SP'HTH ATTORNEY.

Patented Dec. 9, 1941 UNiTED s'rnrs Prem* orties STRAINER Myron H. Smith, ,Newlflartfor N. Y., assignor to D. B. Smith & Company Inc., Utica, N. Y., a corporation of New YorkA Application rJuly 3, 1940, Serial No. 343,759'

1 Claim. (Cl. 21o- 164) tion and convenience in adjustment or in taking apart, as for removing thel sediment or other foreign matter from the strainer.

A furtherl purpose is to provide a strainer of the type indicated which has a transparent shell so that the user can readily notice the action of the y strainer and see whether the strainer members are becoming clogged with an accumulation of sediment or foreign matter too large to go through the perforations of the vstraining member itself. i i

Further purposes and advantages of the inven tion will appear from the specification and claim hereinafter set forth.

Fig. 1 is a side view of a strainer embodying one form of the invention and having a nozzle connected to its outlet or left hand end.

Fig. 2 is a central longitudinal sectional View of the strainer shown in Fig. 1 but with the nozzle removed.

Fig. 3 is a side elevation of the shell used in a said strainer, said shell preferably being transparent.

Fig. 4 is a central longitudinal sectional view through the shell shown in Fig. 3.

Fig. 5 is a transverse sectionalfview on line 5-5 of Fig. 2 and Fig. 6 is a similar transverse sectional View on 1ine6-6ofFig.2.

- f Fig. 7 is a side elevation of the strainer member used in the strainerv shown in` Figs. 1 and 2.

Fig. 8 is a central longitudinal` sectional View of the strainer member shown in Fig. 7. w

Fig. 9 is a central longtudinalsectional view similar to Fig. 2 but of v a modified form of strainer.

Fig. 10 is a transverse sectional view on line III-I0 of Fig. 9. v

Fig. 11 is an end elevation of the end closure and spider-shaped spacing member used at the inlet end of the strainer shown in Fig. 9; f

Fig. 12 is a central longitudinal sectional View of another modified form of strainer embodying this invention.

Referring to the drawings in a more particular description and rst to the form of strainer member I3.

shown in Figs..1 to 8, it will be seen that the strainer comprises a centrally perforated circular cap I5 for the inlet end of the strainer and a very similar centrally perforated circularcap I6 for the outlet end of the strainer, said caps being at the respective right hand and left hand ends of the strainer shown in Figs. 1 to 9, vand 12; and a cylindrical and preferably transparent shell I'I interposed between said two caps, and-a strainer member I8 mounted within said transparent shell and reaching from the inlet cap to the outlet cap.

In the form of the invention shown in Figs. 1 and 2 the strainer member I8 is a double strainer member having its righi', hand or inlet half I9 provided with relatively coarse perforations 20, While the other or Aleft hand and outlet half 2I is provided preferably with nerperforations 22. These screen sections I9 and 2I are conveniently formed of pieces of sheet brass provided respectively With the coarse perforations v2l) and the ne perforations 22, with the pieces of sheet brass rolled to a cylindrical form and with their longitudinal edges suitably fastened together. Adjacent ends of these tWo screen sections are permanently fastened together by being inserted into and soldered to the inside of a ring 23.

Within the ring is placed an imperforate disk 24 preferably permanently fastened in place and forming a partition or baffle between the two halves of the screen member. 7At the outer `or inlet end of the strainer member I9 there isattached an exterior encircling annular ring 25 whichv has at its outer end an annular flange 26, the outer diameter of which is of a size to closely fit the interior diameter of the shell II. The outlet orvleft hand end of the screen or strainer member I8 is provided with a short cylindrical collar ZI fastened to the outside of the left hand end of the outlet half 2| of the strainer or screen A little back from its outer end said collar is provided with an outwardly extending rib I28, which rib has its outer endwise face engage the flange 29 provided at the side of the outlet end of the shell I'I, the engagement of said rib 2B being against the face of said flange 29,

Which faces toward the other end of the shell I1. The peripheral face lat the outer portion of the cellar 21` nts against the axially directed or circular face of said rib 29. In this Way the strainer member is located centrally of the shell II and liquid entering the strainer throughrthe central aperture lof the inlet cap I5 rhas tol enter the chamber of the inlet half I9 of the strainer member. From thence theliquid must pass out-` wardly through the relatively large perforations 2l),v but leaves behind in the chamber of said inlet portion I 9 any sediment or foreign matter too large to go out through the relatively large vholes 20. The spraying liquid that has thus gone out from this first half `of the strainer member passes lengthwise to the left as the parts are shown in vthe drawings, between the strainer member and the inner face of the shell I1 and then passes inwardly through some portion of the second half 2I of the strainer member. Sediment or foreign matter too large to go through the relatively finer holes 22 of this half of the member is left in the space `between the lsaid second half of the strainerand the shell I1. The

user can readily determine the course of the straining operation and especially .can see the accumulation of sediment or foreign matter Within the chamber of the first half of the cham-1 jber,member and especially between the second half gofjthechamb'er andthe second '-half Vof 4t-he shell, 1since the shell as already mentioned 'is preferably fairly transparent; being composed of -jsom'e formi ofplastic that combines the feature of itranspar'ency'with Ysufficient strength vand also resistance to. liquid :and the chemicals ordinarily used for spraying purposes.

1` The shell/ I1, as already mentioned, yis cylindricalin kgeneral shape lwith the vinturned ange 4429jat its outlet end. The Aopposite ends of Vthis shell I1are of appreciablelthickness for somefdisy.tancein fromtheir extreme ends in orderto projvidev material forthe rformation therein `of the `external screw-threading '30 Aat rthe inlet lend of Between these thickened 4ends -however the matelrial 'of the shellisin the -main "of reduced thick-1 neSS but is 'provided with a plurality, esay six, vvoutwardly extending longitudinally arranged ribs V32` which iform stiffening or Arein-forcing lmembers vfor the said shell Aand thus economise in -the 'openingor 'openings of the nozzle 34,-such as is cshownfor the purpose'of :illustration at the outlet end off-the lstrainer in Fig. "1. It will be under-4 stood 'of course that the main purpose o'f my strainer is to prevent the 'clogging -of Vthe small 'openings 'of the `nozzle 34, whichAclogging would temporarily stop 'the vspraying and cause floss of time'jto remove the nozzle land clear :its inside 'parts K off :the 'sediment -or "other `foreign matter.

'are proyfdedwwith 'screw threads' which are noted that the left hand extremity of the inlet cap I5 is provided with an outwardly extending enlargement or rib 31 which has its periphery knurled or otherwise roughened whereby this cap can be removed by hand by the operator without the use of a tool. It will be understood that this inlet end of the strainer is the part that is first disassembled when it is 'desired to remove the strainer member for cleaning that part or for cleaning out the sediment or'other foreign matter from the further end of the shell. The other or outlet cap I6 is in the main constructed similar to the inlet cap I5 in that said outlet cap has its lengthwise extending walls provided with interior screw threads 38 to fit the interior lscrew :threads on the left hand or outlet end of theshell I1. In the bottom of the cup or cavity of this cap is provided a washer of suitable materialadapted to take against the end faces of the shell and of the collar 21 at this end of the strainer mem-ber, so as -to make a water-tight or vliquid-tight connection -with the ycap -and these parts. 1 Y

Preferably instead ofsimply an aperture on this outlet -cap I6 there wil-l -be a `short outwardly extending length of pipe or `tubing 40, preferably formed integral 'withthejcap and provided with exterior screw thread-s 4I, whereby this end -of the strainer can be attached to vthe conventional nozzle 34, or otherwise to the linterior screwythreaded portion of fthe A-fr-,malle lend Aof any Vconventional hoseYcouplingjorr spraying runit par-t. `Preferably onto this 'thradedtubular portion -4I) vvillbe placed an annular'washer 42 as Aof iibre -or the like, to insure -a non-leaking connection between the said cap and the 4nozzle 34 or other attached fitting. l' Y' i f The main variation of my invention shown in Figs. 9, '10 and 11 consists in using a strainer member 43, which is as long as the Ydouble strainer illustrated especial-ly in Figs.Y '1 and 8, and used with the first form of my invention. This strainer member 43 is a sing-le strainer `in the sense that its whole length is provided lwith perforations-'of one size or'grade. AItsoutletfend is provided with a securely fastened collar '44 having an outwardly `extendingintermediately arranged ridge -45 mechanically the same as the parts 21 and 28 alreadydescribed with reference` to Figs. '1 and 8 of the 'rst form of my invention, and in fact the inlet Ycap 41 and the voutlet cap 4.8V and the shell 49fof this form of the device are exactly v'the same yrespectively as the vinlet Ycap .I 5, outlet cap I6 and shell iI'1 y-l'lrst hereindescribed. Y The other variation in 'this modification of my invention is that there is applied Ato the right hand end of the vstrainer member 43 I'aicombinfed stop member and spider locating member 4B ofr which -a'planv view isl shown in 1111. This member Y46 as plainly seen in `the transverse sectional view thereof inFig. vk10, entirely/covers the right hand Aend of this strainer and 'blocks the entrance into this end of the strainer member of the liquid entering the strainer -as `a wholel surface of the shell 4S and a short'cylindricaly flange 64 on the left hand face of the member 46 encircles the adjacent end of the strainer 43 and these hold the body of the stop member 46 in place over this end of the strainer member 43. The openings 50 between the arms 5| allow ample space for the passage to the left of the liquid on its way towards the annular chamber 52, being the space between the inside face of the shell 49 and the outwardly extending and numerously perforated face 53 of the strainer member 43. As the left hand end of this chamber 52 is obviously blocked, the spraying liquid has to pass inwardly anywhere through the whole length of the long strainer member 43. From the inside of this strainer member the liquid will pass lengthwise and to the left as shown in Fig. 9, through the outlet end of the strainer member 43 and out through the central outlet aperture provided in the outlet cap 48. In this form of the strainer all of the Sediment or foreign matter will be left on the outside of the strainer member where it may easily be seen by the user. For many purposes this form of strainer is very effective when the strainer member is provided with holes of the proper size to strain out the undesirable parts carried by the liquid. It will be seen that this modification of the strainer provides twice as much capacity for holding unwanted material outside of the strainer member, as compared with half of the strainer member having its grade of openings as shown in the rst form of my device. In this form of the invention a suitable annular washer 54 is interposed between the bottom of the cavity of the inlet cap and the adjacent end edge of the shell 49 and the outer extremities of the three spacing arms I. This washer therefore obviously holds said member 46 securely in place. In this form of the invention also the device is disassembled by unscrewing the inlet cap 41 from the shell 49, whereupon the strainer member 43 as a whole may be readily removed from the shell and the strainer member and the inside of the shell cleansed of any accumulated sediment and foreign material.

The third form of this invention is plainly i1- lustrated in the central longitudinal sectional view Fig. l2. In this construction the strainer member 55 is of the single gauge or perforation type and extends for substantially the full length of the strainer, and so has large capacity for straining what material can be taken out with a single gauge strainer. This strainer member 55 however is hung from and attached to the inlet or right hand end of the strainer, as by means of the perforated portion of the strainer member 55 being provided at its right hand end with an encircling annular collar 56 from the outer end of which extends a radially arranged flange 51. The shell 58 of this variation is provided slightly spaced in from its right hand end, with an inwardly extending strong rib 59, against the outer or right hand face of which bears the left hand face of the flange 51 of the strainer member 55. The inlet cap 6U of this construction is the same in mechanical structure as the inlet cap l5 of the first form of the invention and iS provided with an interiorly arranged washer 6|, which now Will bear against not only the right hand end edge of the shell 58 but also against the right hand face of the ange 51. In this way the flange of the right hand end of the strainer member is securely held against the shell 58 and thus said strainer member 55 is held in the position of being spaced throughout its whole length from the inside end of the shell 588. It will be understood of course that the left hand end of the strainer member 55 is provided with some form of an imperforate end 62, so that all the liquid entering the strainer member 55 has to go out through the apertures of the strainer member 55 from whence the liquid has to pass endwise to the left and out the central opening provided in the outlet cap 63.

Two or more of any four of my strainers may be used in tandem manner on a hoseline before the nozzle or beyond a spray pump and this arrangement is especially eflicient when two -strainers of either of my modified forms are used,

in which case preferably the strainer first reached by the liquid will have coarser apertures than the second reached strainer.

What I claim as new and desire to patent is:

A strainer for attachment to a sprayer or a spraying hose comprising a centrally apertured inlet cap, a centrally apertured outlet cap, a long cylindrical imperforate transparent shell having its opposite ends screw-threadedly connected to and communicating with said caps, a rigid, self-sustaining cylindrical perforated strainer member enclosed within the shell and reaching from cap to cap, with its opposite llengthwise Ahalves provided with successively smaller screening apertures, outwardly extending flanges at the ends of the strainer member reaching to the adjacent inside of the shell and holding the strainer member spaced from the shell,

and an imperforate baille arranged intermediate the two halves of said strainer member so that the liquid enters the first part of the strainer and passes outwardly therefrom and then moves lengthwise within the shell and then inwardly through the second part of the strainer, and thence out endwise therefrom and through the outlet cap, annular resilient packings interposed between the inner face of each cap and the opposing ends of the shell and of the strainer member and means for detachably connecting the outer ends of said caps to a hose or a sprayer.

MYRON H. SMITH. 

